[Source: Eureka Alert] – In a paper to appear in the journal “Naturwissenschaften,” Stevens Institute of Technology Professor Athula Attygalle and his research student, Xiaogang Wu, report for the first time that some ground beetles produce the natural repellent limonene as their major defensive chemical. The paper is the result of a collaborative research project with Professor Kipling Will (University of California, Berkeley), and Professor David R. Maddison (University of Arizona, Tucson).